Exception on extracting a zipfile, after appending to it in Python

Question

z = zipfile.ZipFile(io.BytesIO(artifact), mode='a') 
z.write("test.txt",arcname=r'bin/test.txt')
z.extractall('out')

Exception: zipfile.BadZipFile was unhandled by user code Message: File name in directory 'bin\test.txt' and header b'bin/test.txt' differ.

The interesting thing is if I write the file to disk, and try extract it, I get a invalid file error. This is on Win 7 by the way.
the bin folder already exists in the zipfile. Full Traceback

Answer 1

Actually the code works well on my Mac,and I think you should let us know that the structure of the zip file or what the variable artifact is.

Here is my advice:

• Use forward slashes as path separators,when you create the zip file.

• Try to print a warning not raise the exception,and check out the out folder,you will find the reason,maybe the slashes or string buffer.

Also you can read this issue.

Hope this helps.